EP0831176A1 - Use of sugar-mill carbonatation muds in paper-making - Google Patents
Use of sugar-mill carbonatation muds in paper-making Download PDFInfo
- Publication number
- EP0831176A1 EP0831176A1 EP97116484A EP97116484A EP0831176A1 EP 0831176 A1 EP0831176 A1 EP 0831176A1 EP 97116484 A EP97116484 A EP 97116484A EP 97116484 A EP97116484 A EP 97116484A EP 0831176 A1 EP0831176 A1 EP 0831176A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- muds
- sugar
- per
- suspension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/01—Waste products, e.g. sludge
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/02—Material of vegetable origin
Definitions
- the present invention refers to the preparation and use of carbonatation muds deriving from sugar-beet processing.
- the carbonatation muds are the product of reaction between the lime solution used for purifying sugar extraction juices and acid gases, coming from the heat decomposition of limestone and from the combustion of organic fuels.
- Particularly useful for paper making were found to be vegetable substances consisting in the wastes or residuals of several agricultural processes, such as integral straw, integral corn, corn-cobs, wheat bran, chaff of rice and other cereals, sugar-cane processing residuals, seed residuals after the extraction of oils, the residuals after the extraction of starch from corn, tapioca (kassava), grape residuals from the extraction of wine, the residuals of distillates and the vegetable residuals coming from agricultural-food processing.
- various agricultural processes such as integral straw, integral corn, corn-cobs, wheat bran, chaff of rice and other cereals, sugar-cane processing residuals, seed residuals after the extraction of oils, the residuals after the extraction of starch from corn, tapioca (kassava), grape residuals from the extraction of wine, the residuals of distillates and the vegetable residuals coming from agricultural-food processing.
- these are dried at a temperature of not higher than 150°C and subsequently reduced to powder (flour) by means of micronizing mills and technologies commonly used to produce flours for food use.
- inorganic materials as filler or as coat in the paper-making industry is very widespread and mainly concerns kaolin and calcium carbonate.
- combustion fumes and depleted beet pulps represents a particularly advantageous process from the energy standpoint, considering the possibility of using the muds merely filtered without drying them, and for the reduced consumption of non-renewable mineral substances (use of the carbon and sulphur contained in the combustion fumes).
- a further advantageous characteristic of the invention's process is the fact that by using waste products such as depleted beet pulp and the carbonatation minds deriving also from the combustion fumes of heating plants, substances directly usable in paper making are obtained.
- the calcium carbonate content can be from 65% to 80%, the CaO from 35% to 45%, the Mgo from 1% to 2%, the K 2 0 from 0.1% to 0.5%, the P 2 O 5 from 1% to 2% and nitrogen from 0.2% to 0.8%.
- the carbonatation muds deriving from sugar-beet processing are made to react with acid gases coming from the heat decomposition of the limestone and from the combustion of organic fuels.
- the reaction is done in such a way that the pH of the carbonatation muds suspension, reaches a value of between 8 and 11.
- the muds thus treated are therefore utilized in paper making, eventually after the addition of 1% to 30% in weight of colloids or agglomerating or their mixtures to reduce their solubility in the process water to values of less than 2% in weight.
- colloids and agglomerating useful for this purpose are the cationizing starches, partially micronized starches, aluminium salts, in particular the sulfate and polychloride, and iron sulfate.
- the process according to the present invention offers an inorganic flour usable in paper making, both in pulp and in size press coating.
- the muds can come from sugar mills using lime furnaces fed with limestone and fossil fuels or hydrocarbons of different origin, or by sugar mills using calcium oxide, which is saturated using the combustion gases.
- the dry-matter content of muds is normally between 40% and 80% in weight.
- muds can be pre-sifted with filters of 50/150 mesh per linear inch to obtain a product directly usable as pulp filler in paper making.
- the paper-making process according to the present invention therefore comprises the following fundamental stages:
- the mud suspension obtained as given in point a) can be mixed with other additives normally used in paper making, such as starch, kaolin, calcium carbonate, talc, barium sulfate, diatoms, zeolites, silicons, retentives, dyes, coagulants, fluidizers and bacteriostatics.
- additives normally used in paper making such as starch, kaolin, calcium carbonate, talc, barium sulfate, diatoms, zeolites, silicons, retentives, dyes, coagulants, fluidizers and bacteriostatics.
- the suspension muds given in point b) are dried, ground and sifted in order to have particles of average dimensions of less than 20 microns, suitable for use in the paper pulp, or of average dimensions of less than 5 microns, suitable for use as coatings on surfaces.
- inorganic fillers converted into flour can be used to make paper and card, just like traditional inorganic fillers.
- mud flours can be mixed with other substances and with other additives intended for use in paper making, such as cellulose, waste paper, starch, kaolin, calcium carbonate, talc.
- the mud flour has a specific weight of 2.5 kg/dm3 and apparent specific weight of 1.5 kg/dm3.
- Pulp having the composition given in Table 1 was put in paper machine of capacity of about 700 Kg/h of paper.
- Diketenetic-type synthetic bonding agent was added to the pulp to make the paper suitable for writing with watery inks, and cationic starch to retain the mineral fillers in the paper.
- the outlet belt speed was adjusted to 72 metres per minute.
- the paper machine was automatically controlled by an Accuray 1880 Micro Plus system.
- This system measures and automatically controls substance (gr/m2), moisture (water %), thickness (microns) and controls opacity, whiteness and mineral content.
- the paper was produced at 90 gr/m2 and with respect to the white reference took on a natural ivory colour.
- the paper was perfectly drawable, writable, photocopiable and printable.
- Table 2 gives the main characteristics of the paper obtained compared with paper produced under the same operative conditions using traditional calcium carbonate.
- Expancell P-50 was added in example B to verify the behaviour of a fibre panel containing carbonatation muds in products having a high air-content. This behaviour was excellent.
- Paper pulp composition DESCRIPTION Unit Reference Example A Example B Bleached chemical pulp (70% Eucaplyptus 30% Fir) Kg. 640 640 640 % 79,5 79,5 78,4 CaCO 3 micronized Kg. 130 0 0 % 16,1 0 0 Carbonatation mud flour Kg. 0 130 130 % 0 16,1 16 Methyletilketene dimer (AKD bonding agent) Kg. 10 10 10 10 % 1,2 1,2 1,2 Cationic starch Kg.
- A Bleached chemical pulp (70% Eucaplyptus 30% Fir) Kg. 640 640 640 % 79,5 79,5 78,4 CaCO 3 micronized Kg. 130 0 0 % 16,1 0 0 Carbonatation mud flour Kg.
Abstract
Description
- moisture
- 28%
- copper
- 15 mg/Kg
- iron
- 750 mg/Kg
- zinc
- 30 mg/Kg
- total solubles
- 0.22%
- total nitrogen
- 0.25%
Paper pulp composition | ||||
DESCRIPTION | Unit | Reference | Example A | Example B |
Bleached chemical pulp (70% Eucaplyptus 30% Fir) | Kg. | 640 | 640 | 640 |
% | 79,5 | 79,5 | 78,4 | |
CaCO3 micronized | Kg. | 130 | 0 | 0 |
% | 16,1 | 0 | 0 | |
Carbonatation mud flour | Kg. | 0 | 130 | 130 |
% | 0 | 16,1 | 16 | |
Methyletilketene dimer (AKD bonding agent) | Kg. | 10 | 10 | 10 |
% | 1,2 | 1,2 | 1,2 | |
Cationic starch | Kg. | 6 | 6 | 6 |
% | 0,7 | 0,7 | 0,7 | |
Expancell P 50 | Kg. | 0 | 0 | 10 |
% | 0 | 0 | 1,2 | |
Surface starch (size press) | Kg. | 20 | 20 | 20 |
% | 2,5 | 2,5 | 2,5 | |
TOTAL | Kg. | 806 | 806 | 816 |
% | 100 | 100 | 100 |
Characteristics of papers obtained | ||||
DESCRIPTION | Unit | Reference | Example A | Example B |
Grammage | g/m2 | 90 | 90 | 90 |
Thickness | micron | 105 | 117 | 149 |
Bulk | dm3/kg | 1,17 | 1,30 | 1,65 |
Ash (525°C) | % | 16 | 16 | 15 |
Ink flotation (Pelikan 4001) | min | 4 | 5 | 2 |
Cobb (60 sec) | g/m2 | 32 | 33 | 40 |
Smoothness (Gurley 100 ml) | sec | 150 | 100 | 90 |
Air permeability (Gurley 100 ml) | sec | 45 | 13 | 4 |
Dennison waxes | N | 16/18 | 16/18 | 14/16 |
Breaking lenght long./cross | Km | 7,0 | 7,2 | 6,1 |
3,5 | 3,9 | 3,3 | ||
Dust-free rating (400 sheets) | good | good | fair | |
Absolute humidity | % | 7,0 | 6,7 | 6,9 |
Claims (6)
- Process for making paper containing carbonatation muds deriving from the processing of sugar-beets, whereby:a) the lime solution used to purify the sugar extraction juices is made to react with the acid gases coming from the heat decomposition of the limestone and from the combustion of organic fuels with the forming of a mud suspension having a pH of between 8 and 11;b) this mind suspension is subjected to operations of sedimentation, filtering and/or thickening, giving muds with a dry-content of between 40 and 80% in weight;c) these muds are added as an additive to the cellulose fibre for converting into paper, in quantities of from 2% to 65% in weight with respect to the cellulose fibres.
- Process as per claim 1. whereby, before undergoing stages b) and c), fluidizers and bacteriostatics are added to the mud suspension of point a).
- Process as per claim 1. whereby before being mixed with cellulose fibres, the mud suspension obtained of point a) is mixed with one or more compounds such as starch, kaolin, calcium carbonate, talc, barium sulfate, diatoms, zeolites, silicons, retentives, dyes, coagulants.
- Process as per claim 3. whereby the mud suspension mixed with these compounds is added to the cellulose fibres for converting into paper, in quantities of from 1% to 40% in weight with respect to the paper.
- Process as per claim 1. whereby the mud suspension of point a) is dried and the solids obtained ground and sifted in order to obtain particles of average dimensions of less than 20 microns, suitable for use in the pulp.
- Process as per claim 1. whereby the mud suspension of point a)
is dried and the solids obtained ground and sifted in order to obtain particles of average dimensions of less than 5 microns, suitable for use in surfaces as coatings.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT96VA000017A IT1288480B1 (en) | 1996-09-20 | 1996-09-20 | USE OF SUGAR CARBONATION SLUDGE IN PAPER PRODUCTION |
ITVA960017 | 1996-09-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0831176A1 true EP0831176A1 (en) | 1998-03-25 |
EP0831176B1 EP0831176B1 (en) | 2004-10-27 |
Family
ID=11423382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97116484A Expired - Lifetime EP0831176B1 (en) | 1996-09-20 | 1997-09-22 | Use of sugar-mill carbonatation muds in paper-making |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0831176B1 (en) |
DE (1) | DE69731350T2 (en) |
ES (1) | ES2231836T3 (en) |
IT (1) | IT1288480B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1088859A1 (en) * | 1999-09-28 | 2001-04-04 | Geopolimeri S.r.l. | Process for producing inorganic flours from natural waste products and their use |
EP1302251A2 (en) * | 2001-07-16 | 2003-04-16 | Cofav S.P.A. | Method for producing a vegetable flour using residues of agroindustrial processes, and method for producing paper and cardboard using said flour |
US20170002171A1 (en) * | 2013-12-13 | 2017-01-05 | T&L Sugars Limited | Additives for use in plastic, resin and elastomer compositions |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922310A1 (en) * | 1989-07-07 | 1991-01-10 | Hoelter Heinz | Using waste from sugar beet - by processing to desulphurise chimney gas giving prod. suitable as improver for acidified soil |
EP0644293A1 (en) * | 1993-09-21 | 1995-03-22 | CARTIERA FAVINI S.p.A. | Process for manufacturing paper from sugar-beet pulp and paper thus obtained |
-
1996
- 1996-09-20 IT IT96VA000017A patent/IT1288480B1/en active IP Right Grant
-
1997
- 1997-09-22 ES ES97116484T patent/ES2231836T3/en not_active Expired - Lifetime
- 1997-09-22 EP EP97116484A patent/EP0831176B1/en not_active Expired - Lifetime
- 1997-09-22 DE DE69731350T patent/DE69731350T2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3922310A1 (en) * | 1989-07-07 | 1991-01-10 | Hoelter Heinz | Using waste from sugar beet - by processing to desulphurise chimney gas giving prod. suitable as improver for acidified soil |
EP0644293A1 (en) * | 1993-09-21 | 1995-03-22 | CARTIERA FAVINI S.p.A. | Process for manufacturing paper from sugar-beet pulp and paper thus obtained |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1088859A1 (en) * | 1999-09-28 | 2001-04-04 | Geopolimeri S.r.l. | Process for producing inorganic flours from natural waste products and their use |
EP1302251A2 (en) * | 2001-07-16 | 2003-04-16 | Cofav S.P.A. | Method for producing a vegetable flour using residues of agroindustrial processes, and method for producing paper and cardboard using said flour |
EP1302251A3 (en) * | 2001-07-16 | 2004-06-16 | Cofav S.P.A. | Method for producing a vegetable flour using residues of agroindustrial processes, and method for producing papers and cardboards using said flour |
US20170002171A1 (en) * | 2013-12-13 | 2017-01-05 | T&L Sugars Limited | Additives for use in plastic, resin and elastomer compositions |
Also Published As
Publication number | Publication date |
---|---|
ITVA960017A1 (en) | 1998-03-20 |
EP0831176B1 (en) | 2004-10-27 |
ITVA960017A0 (en) | 1996-09-20 |
ES2231836T3 (en) | 2005-05-16 |
IT1288480B1 (en) | 1998-09-22 |
DE69731350T2 (en) | 2005-10-13 |
DE69731350D1 (en) | 2004-12-02 |
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